Ripple voltage is caused by the charging and discharging of the diodes
Indicate whether the statement is true or false
FALSE
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What is the pressure in psi required to lift water 20 feet?
A) 14.7 psi—just enough to overcome atmospheric pressure B) (20 ft × 0.433 lb/ft) 144 in2/ft2 = 0.06 psi C) 20 ft × 0.433 lb/ft = 8.66 psi D) It is not possible to determine the pressure without knowing the cross sectional area of the pipe.
Which of the following is a step in checking a system's defrost cycle?
A) Turn off the pressure switch. B) Set the defrost thermostat to a higher temperature. C) Short the test pins together. D) Clear the area around the outdoor coil.
In ____________________ timers, the contacts stay in their original position until a solenoid plunger has moved through its entire travel distance.
Fill in the blank(s) with the appropriate word(s).
The recovery level for Type III systems using a recovery device manufactured before November 15, 1993, is:
A) 4 in Hg vacuum. B) 25 mm absolute pressure. C) 25 in Hg vacuum. D) 0 psig.